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Q58E

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Discrete Mathematics and its Applications

Found in: Page 56

Book edition 7th

Author(s) Kenneth H. Rosen

Pages 808 pages

ISBN 9780073383095

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Short Answer

Suppose that Prolog facts are used to define the predicates mother $(M, Y)$ and father $(F, X)$ which represent that M is the mother of Y and F is the father of X, respectively. Give a Prolog rule to define the predicate grandfather $(X, Y)$ , which represents that X is the grandfather of Y. [Hint: You can write a disjunction in Prolog either by using a semicolon to separate predicates or by putting these predicates on separate lines.]

grandfather $(X, Y)$ : - mother $(M, Y)$ , father $(X, M)$ ; father $(F, Y)$ , father $(X, F)$

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Step by Step Solution

TABLE OF CONTENTS :

TABLE OF CONTENTS

Step 1: Given information

Prolog facts are used to define the predicates mother $(M, Y)$ and father $(F, X)$ which represent that M is a mother of Y and F is the father of X respectively.

Step 2: Prolog rule to define the predicate sibling(X,Y)

grandfather $(X, Y)$ : - mother $(M, Y)$ , father $(X, M)$ ; father $(F, Y)$ ,father $(X, F)$ $(X, F)$

Where, :- means define and , represents a conjunction and ; represent a disjunction.

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